EP3850248A1 - Ölkühlkreislauf eines automatikgetriebes - Google Patents
Ölkühlkreislauf eines automatikgetriebesInfo
- Publication number
- EP3850248A1 EP3850248A1 EP19769397.1A EP19769397A EP3850248A1 EP 3850248 A1 EP3850248 A1 EP 3850248A1 EP 19769397 A EP19769397 A EP 19769397A EP 3850248 A1 EP3850248 A1 EP 3850248A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oil
- heat exchanger
- automatic transmission
- cooling circuit
- volume flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0413—Controlled cooling or heating of lubricant; Temperature control therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/08—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels using fluid or powdered medium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T10/00—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope
- B60T10/02—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope with hydrodynamic brake
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T5/00—Vehicle modifications to facilitate cooling of brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D57/00—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders
- F16D57/04—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders with blades causing a directed flow, e.g. Föttinger type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0415—Air cooling or ventilation; Heat exchangers; Thermal insulations
- F16H57/0417—Heat exchangers adapted or integrated in the gearing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
- F16D2065/782—Features relating to cooling the brake-actuating fluid being used as a coolant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H2061/0037—Generation or control of line pressure characterised by controlled fluid supply to lubrication circuits of the gearing
Definitions
- the present invention relates to the oil cooling circuit of an automatic transmission or automated manual transmission in a drive train.
- Oil supplies for automatic transmissions or automated manual transmissions conventionally have an oil pump which is driven by the internal combustion engine.
- the oil pump conveys oil from the oil sump and from there into an oil supply line network for supplying oil to elements of the transmission.
- the various elements that are present in an automatic transmission or automated manual transmission include clutches, brakes, a converter, a hydrodynamic brake (retarder) and the lubrication points of a transmission.
- the different elements require a very different oil volume with very different oil pressures at different times during vehicle operation.
- An oil supply system is known from DE 10 2015 218 358 A1, in which a temperature sensor in the flow direction behind the pump device is provided for oil temperature monitoring, in order to detect the oil temperature in the pressure line. This positioning of the temperature sensor enables critical temperatures in the pressure line to be detected. To further improve operational safety, the temperature sensor can be provided behind the hydrodynamic converter as seen in the flow direction. It is also known to additionally measure the oil sump temperature. Monitoring the oil temperature in the gearbox therefore requires 2 temperature sensors.
- the present invention is based on the object of specifying an oil supply for an automatic transmission or automated manual transmission that enables optimized cooling of the oil volume flows in different operating states.
- An oil supply for an automatic transmission or an automated manual transmission in a drive train which comprises an oil sump and a heat exchanger, the oil supply being provided for at least the following operating states of the automatic transmission:
- two heat exchangers are provided, through which an oil volume flow can be conducted depending on the operating state of the automatic transmission. If two heat exchangers are used, they can each be adapted to the conditions of the operating states, so that the cooling of the corresponding oil volume flows is improved.
- a measuring device for measuring an oil circuit temperature can be provided, by means of which the temperature of the oil volume flow can be measured in all operating states. This means that the most critical temperature can be monitored for each operating state and the function of the gearbox can be ensured without running the risk of overheating the oil.
- regulation strategies can be provided in order to keep the temperature of the oil volume flow at a desired level or to regulate it for an operating state.
- the temperature of the oil volume flow through the converter, in retarder operation, the temperature the oil volume flow through the retarder and in the ferry mode, in which one of the mechanical gears is in operation, the oil sump temperature is measured.
- both heat exchangers are provided for converter operation and ferry operation and only the second heat exchanger for retarder operation.
- the measuring device can comprise a sensor, by means of which the temperature of the oil volume flow that flows into the second heat exchanger can be measured.
- a sensor by means of which the temperature of the oil volume flow that flows into the second heat exchanger can be measured.
- a certain heat transfer to the flow connection of the second heat exchanger takes place when the oil flow in the first heat exchanger rises sharply, so that through the Heat transfer can also be detected if the temperature rises.
- thermosensor By positioning the temperature sensor in front of the heat exchanger inlet of the second heat exchanger, different temperatures can be measured depending on the operating state of the transmission, because in all operating states an oil volume flow is passed through the second heat exchanger. A second temperature sensor can thus be dispensed with.
- the heat exchangers can be designed for different oil volume flows.
- the channels through the heat exchanger can be designed differently.
- the oil volume flows through the first heat exchanger and the second heat exchanger can thus preferably be designed in a ratio of 1: 2.
- Other ratios are also conceivable, which are in the range from 1: 1, 25 to 1: 3.
- Valves can also be provided in the oil cooling circuit, by means of which the oil volume flows can be regulated.
- these can be the valves for regulating the converter and the retarder.
- a pressure control valve for regulating the oil volume flow through the converter can be provided, the pressure control valve being provided between the converter and the first and second heat exchangers.
- a first changeover valve and a second changeover valve can be provided, so that in the braking operation of the retarder the oil volume flow can be conducted through the second heat exchanger for dissipating the brake energy.
- the first switching valve can be switchable in such a way that in the ferry mode, in one of the mechanical gears of the automatic transmission, the oil volume flow from the oil sump can be conducted through the second heat exchanger and / or the first heat exchanger via a bypass line.
- Fig. 1 Functional diagram of the oil circuit for oil supply
- FIG. 1 shows the functional diagram of the oil circuit according to the invention for supplying oil to an automatic transmission. The scheme was reduced to the details relevant to the invention that are necessary for oil cooling.
- a pump conveys the oil from the oil sump 19 via the oil supply line 3 to all relevant components in the transmission, so that the oil supply is ensured for at least the following operating states of the automatic transmission; the converter operation;
- control valve 5 The task of the control valve 5 is to control the power control of the converter 4, which will not be discussed in more detail here.
- the heated oil that is to say an oil flow, is passed via line 6 and the WT supply line 7 to the heat exchangers 11 and 12.
- the oil volume flow 21 d is passed from the oil sump 19 via the bypass line 4, the line 6 and the WT supply line 7 to the heat exchangers 11 and 12.
- the oil volume flow 21 d is routed through the converter 2 through the second heat exchanger 12 and the first heat exchanger 11.
- the oil volume flow 21 d is divided into the oil volume flows 21 a and 21 b.
- the two changeover valves 13 and 14 are switched simultaneously, so that only the second heat exchanger 12 is used in the retarder mode for cooling the oil in order to dissipate the braking energy.
- the retarder control will not be discussed further in connection with this invention.
- the primary switching valve 14 is switched in a first step, so that the retarder is filled, and at the latest when the filling is complete, the changeover valve 13 is also switched so that the entire oil volume flow 21c is pumped through the retarder 9 and passed through the heat exchanger 12 via the connecting channel 25b.
- the measuring device 20 whose position in the area of the connecting channel 25 b is shown in more detail in FIG. 2. This is provided for measuring the temperature of the oil volume flow 21 b.
- One sensor of the measuring device 20 is arranged on the connecting channel 25 b. The temperature of the oil volume flow 21 b in the second heat exchanger 12 can thus be measured for all operating states.
- control strategies apply, with which the oil temperature is regulated to definable limit temperatures. For example, reducing the braking power of the retarder.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Details Of Gearings (AREA)
- Control Of Transmission Device (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018122333.1A DE102018122333A1 (de) | 2018-09-13 | 2018-09-13 | Ölkühlkreislauf eines Automatikgetriebes |
| PCT/EP2019/073673 WO2020053058A1 (de) | 2018-09-13 | 2019-09-05 | Ölkühlkreislauf eines automatikgetriebes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3850248A1 true EP3850248A1 (de) | 2021-07-21 |
| EP3850248B1 EP3850248B1 (de) | 2026-04-01 |
Family
ID=67982020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19769397.1A Active EP3850248B1 (de) | 2018-09-13 | 2019-09-05 | Ölkühlkreislauf eines automatikgetriebes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12066094B2 (de) |
| EP (1) | EP3850248B1 (de) |
| CN (1) | CN112689722B (de) |
| DE (1) | DE102018122333A1 (de) |
| WO (1) | WO2020053058A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019214842A1 (de) * | 2019-09-27 | 2021-04-01 | Zf Friedrichshafen Ag | Halter zur Befestigung eines Wärmeübertragers an einem Getriebe |
| DE102019214840A1 (de) * | 2019-09-27 | 2021-04-01 | Zf Friedrichshafen Ag | Anordnung eines Getriebes und eines Wärmeübertragers |
| DE102022109525B3 (de) * | 2022-04-20 | 2023-06-29 | Voith Patent Gmbh | Automatgetriebe mit Wandler und die Regelung des Wandlers |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3430456A1 (de) | 1984-08-18 | 1985-10-31 | Daimler-Benz Ag, 7000 Stuttgart | Kuehlvorrichtung fuer hydraulisches arbeitsmittel einer hydrodynamischen bremse und schmieroel eines wechselgetriebes |
| JPS6183405A (ja) * | 1984-09-29 | 1986-04-28 | Nissan Motor Co Ltd | 潤滑油冷却装置 |
| DE19902408C2 (de) * | 1999-01-22 | 2003-01-02 | Zahnradfabrik Friedrichshafen | Automatgetriebe für Fahrzeuge mit einem hydrodynamischen Wandler |
| US6427640B1 (en) * | 2000-10-11 | 2002-08-06 | Ford Global Tech., Inc. | System and method for heating vehicle fluids |
| US6536381B2 (en) * | 2001-02-20 | 2003-03-25 | Volvo Trucks North America, Inc. | Vehicle lubricant temperature control |
| DE10138704A1 (de) * | 2001-08-07 | 2003-03-06 | Zahnradfabrik Friedrichshafen | Kühlsystem |
| DE10301314A1 (de) * | 2003-01-15 | 2004-07-29 | Behr Gmbh & Co. Kg | Kühlkreislauf, insbesondere für ein Kraftfahrzeuggetriebe |
| SE532729C2 (sv) * | 2008-08-22 | 2010-03-23 | Scania Cv Ab | Kylsystem hos ett fordon som drivs av en förbränningsmotor |
| DE102009035082A1 (de) * | 2009-07-28 | 2011-02-10 | Voith Patent Gmbh | Getriebeölkreislauf |
| JP6354699B2 (ja) * | 2015-08-06 | 2018-07-11 | トヨタ自動車株式会社 | 熱交換装置 |
| DE102015218345A1 (de) * | 2015-09-24 | 2017-03-30 | Voith Patent Gmbh | Antriebsstrang mit Automatgetriebe oder automatisiertem Schaltgetriebe, einer Ölversorgung und einem hydrodynamischen Retarder |
| DE102015218352A1 (de) * | 2015-09-24 | 2017-03-30 | Voith Patent Gmbh | Ölversorgung eines Automatgetriebes oder automatisierten Schaltgetriebes, Kraftfahrzeugantriebsstrang und Verfahren zur Versorgung eines solchen Getriebes |
| DE102015218358A1 (de) | 2015-09-24 | 2017-03-30 | Voith Patent Gmbh | Ölversorgung eines Automatgetriebes oder automatisierten Schaltgetriebes, in einem Antriebsstrang |
| US10161501B2 (en) * | 2016-04-25 | 2018-12-25 | GM Global Technology Operations LLC | System and method for adjusting coolant flow through a cooling system of a vehicle to increase a warming rate of a transmission |
-
2018
- 2018-09-13 DE DE102018122333.1A patent/DE102018122333A1/de active Pending
-
2019
- 2019-09-05 EP EP19769397.1A patent/EP3850248B1/de active Active
- 2019-09-05 CN CN201980060029.XA patent/CN112689722B/zh active Active
- 2019-09-05 WO PCT/EP2019/073673 patent/WO2020053058A1/de not_active Ceased
-
2021
- 2021-03-11 US US17/198,465 patent/US12066094B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018122333A1 (de) | 2020-03-19 |
| CN112689722B (zh) | 2025-01-24 |
| WO2020053058A1 (de) | 2020-03-19 |
| EP3850248B1 (de) | 2026-04-01 |
| US12066094B2 (en) | 2024-08-20 |
| CN112689722A (zh) | 2021-04-20 |
| US20210199189A1 (en) | 2021-07-01 |
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